No.3（2008）4.An Approach for Improving Security of Embedded Systems

Yasuharu Irizuki, Mamoru Ohara, Kazumi Sakamaki

Embedded systems are indispensable existence for home electronics and all industrial equipment appliances. Recently, rapidly growing numbers of embedded systems are connected to the networks. Thus we must to consider the security of such networked embedded systems. We assume the embedded system is constructed with an FPGA (Field Programmable Gate Array), which is a rewritable integrated circuit chip. We propose effective techniques for the improvement of security and safety, based on study results of an embedded system that uses an existing FPGA. Based on existing study results for improved embedded system security, it was thought that two aspects were required: improved information privacy, and prevention of system malfunctioning Techniques were examined for preventing system malfunction and improved information secrecy. We set four problems, and did development produced a demonstration machine for trial purposes.

Keywords

embedded systems, security, FPGA, JTAG, boundary-scan test, Multi-CPU system

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